The AirTAC GFR300C08AC2W AirTAC Filter Regulator PT1/4, Auto Drain is a genuine G-series filter regulator: water separation, 40 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has See datasheet ports, a differential-pressure drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR300C08AC2W is a size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has a PT1/4 (1/4 in) port with PT thread, a 5 um filter element (the finer of the two catalogue grades), an automatic drain that ejects collected condensate without manual attention, a standard regulator with a 0.15-0.9 MPa (20-130 psi) adjustment range, and a round pressure gauge reading in psi. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and with choices of drain type, filter grade, gauge style and scale, and G or NPT thread options. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures for your application on request.
| Model | GFR300C08AC2W AirTAC Filter Regulator PT1/4, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Standard type |
| Adjusting mechanism | Balanced type |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Drain type | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — factory standard, Factory standard scale |
| Reflux valve | Not fitted |
Specifications follow the official AirTAC G-series air-preparation data. The regulating band is set by the drain type: automatic and differential-pressure drains regulate 0.15 - 0.9 MPa, a manual drain regulates 0.05 - 0.9 MPa. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). Air must not freeze in the unit. Flow curves, weight and outline dimensions are not published in our data set — ask us and we will confirm from the factory datasheet.
| GFR300 | G-series filter regulator, 300 body — sets the port range. |
|---|---|
| C0 | Port size See datasheet. This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT thread. PT is the default; G is BSPP and T is NPT. |
| (blank) | No reverse-flow valve (the default). |
Field order is size, port, drain, type, bracket, gauge, shape, scale, grade, thread, reflux — a blank position takes the default. Example: GFR300-08 is a 300 body, PT1/4", differential drain, standard type, bracket included, gauge fitted, 40 µm, PT thread, no reflux valve.
A larger body carries a larger port and holds set pressure better as flow rises. AirTAC publishes flow only as curves, so size the body from your peak demand with headroom. The GFR600 uses an aluminium-alloy bowl; the 200, 300 and 400 bodies use PC.
| This model | GFR300 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C0 (two-unit set) |
Feeding clean, regulated air to the tool-change and clamping circuits of a machining center, where the 5 um element protects directional valves and the automatic drain handles condensate from a compressor-fed ring main.
Regulating supply pressure to pneumatic actuators on a bottling or carton-packing line, with the automatic drain keeping moisture out of cylinders and the psi gauge giving operators a visible setpoint during changeover.
Providing filtered, adjustable air to lab benches and test rigs where instruments are sensitive to particles and pressure drift; the 5 um grade and fine regulator adjustment keep the supply stable and clean.
Size and port drive the choice: the 300 size with a PT1/4 port suits lines plumbed at 1/4 in; step up to 400 or 600 where higher flow demand requires larger ports. Choose the drain to match access: automatic (this unit) suits unattended or hard-to-reach installations, manual suits attended stations, and the differential-pressure default drains on load. The 5 um element (code W) is the finer grade versus the 40 um standard - pick 5 um where downstream valves and instruments need cleaner air. Gauge style and scale are decodable: this unit carries a round gauge on a psi scale, while embedded square gauges and MPa or bar scales are the other catalogue options. PT is the standard thread; G (BSPP) and NPT are order options. A mounting bracket is included with this size.
One honest note before ordering: AirTAC publishes flow as curves, not a single rated number, so we do not quote a rated flow figure here. Ask us to confirm sizing against your application and we will check the datasheet with you before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR300 series as curves rather than a single rated figure, so we do not quote a rated flow number. Tell us your inlet pressure and the flow your application needs, and we will confirm the sizing against the datasheet curves on request before you order.
The A in the code GFR300C08AC2W means an automatic drain: collected condensate is ejected without anyone opening the drain, which suits unattended or hard-to-reach installations. The GFR300 family is also available with a manual drain or the differential-pressure default, and the regulation range differs by drain type - 0.15-0.9 MPa (20-130 psi) for automatic and differential-pressure drains, 0.05-0.9 MPa (7-130 psi) for manual drain.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity, thread type (PT / G / NPT), gauge scale and destination. We confirm price, availability and lead time — usually within 7-8 hours.